Subtract 21/81 from 56/20
1st number: 2 16/20, 2nd number: 21/81
56/20 - 21/81 is 343/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
56/20 = 56 × 81/20 × 81 = 4536/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
21/81 = 21 × 20/81 × 20 = 420/1620 - Subtract the two like fractions:
4536/1620 - 420/1620 = 4536 - 420/1620 = 4116/1620 - After reducing the fraction, the answer is 343/135
- In mixed form: 273/135
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